#include <iostream>

const int ArSize = 8;

int sum_arr(int arr[], int n);

int main(){
    using namespace std;

    int cookies[ArSize] = {1, 2, 4, 8, 16, 32, 64, 128};

    int sum = sum_arr(cookies, ArSize);
    cout << "Total cookies eaten: " << sum << endl;
    return 0;
}

int sum_arr(int arr[], int n){
    int total = 0;

    for (int i =0; i < n; i++){
        total += arr[i];
    }

    return total;
}